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;
; Copyright (c) 2014 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
%include "third_party/x86inc/x86inc.asm"
; This file provides SSSE3 version of the forward transformation. Part
; of the macro definitions are originally derived from the ffmpeg project.
; The current version applies to x86 64-bit only.
SECTION_RODATA
pw_11585x2: times 8 dw 23170
pd_8192: times 4 dd 8192
%macro TRANSFORM_COEFFS 2
pw_%1_%2: dw %1, %2, %1, %2, %1, %2, %1, %2
pw_%2_m%1: dw %2, -%1, %2, -%1, %2, -%1, %2, -%1
%endmacro
TRANSFORM_COEFFS 11585, 11585
TRANSFORM_COEFFS 15137, 6270
TRANSFORM_COEFFS 16069, 3196
TRANSFORM_COEFFS 9102, 13623
SECTION .text
%if ARCH_X86_64
%macro SUM_SUB 3
psubw m%3, m%1, m%2
paddw m%1, m%2
SWAP %2, %3
%endmacro
; butterfly operation
%macro MUL_ADD_2X 6 ; dst1, dst2, src, round, coefs1, coefs2
pmaddwd m%1, m%3, %5
pmaddwd m%2, m%3, %6
paddd m%1, %4
paddd m%2, %4
psrad m%1, 14
psrad m%2, 14
%endmacro
%macro BUTTERFLY_4X 7 ; dst1, dst2, coef1, coef2, round, tmp1, tmp2
punpckhwd m%6, m%2, m%1
MUL_ADD_2X %7, %6, %6, %5, [pw_%4_%3], [pw_%3_m%4]
punpcklwd m%2, m%1
MUL_ADD_2X %1, %2, %2, %5, [pw_%4_%3], [pw_%3_m%4]
packssdw m%1, m%7
packssdw m%2, m%6
%endmacro
; matrix transpose
%macro INTERLEAVE_2X 4
punpckh%1 m%4, m%2, m%3
punpckl%1 m%2, m%3
SWAP %3, %4
%endmacro
%macro TRANSPOSE8X8 9
INTERLEAVE_2X wd, %1, %2, %9
INTERLEAVE_2X wd, %3, %4, %9
INTERLEAVE_2X wd, %5, %6, %9
INTERLEAVE_2X wd, %7, %8, %9
INTERLEAVE_2X dq, %1, %3, %9
INTERLEAVE_2X dq, %2, %4, %9
INTERLEAVE_2X dq, %5, %7, %9
INTERLEAVE_2X dq, %6, %8, %9
INTERLEAVE_2X qdq, %1, %5, %9
INTERLEAVE_2X qdq, %3, %7, %9
INTERLEAVE_2X qdq, %2, %6, %9
INTERLEAVE_2X qdq, %4, %8, %9
SWAP %2, %5
SWAP %4, %7
%endmacro
; 1D forward 8x8 DCT transform
%macro FDCT8_1D 1
SUM_SUB 0, 7, 9
SUM_SUB 1, 6, 9
SUM_SUB 2, 5, 9
SUM_SUB 3, 4, 9
SUM_SUB 0, 3, 9
SUM_SUB 1, 2, 9
SUM_SUB 6, 5, 9
%if %1 == 0
SUM_SUB 0, 1, 9
%endif
BUTTERFLY_4X 2, 3, 6270, 15137, m8, 9, 10
pmulhrsw m6, m12
pmulhrsw m5, m12
%if %1 == 0
pmulhrsw m0, m12
pmulhrsw m1, m12
%else
BUTTERFLY_4X 1, 0, 11585, 11585, m8, 9, 10
SWAP 0, 1
%endif
SUM_SUB 4, 5, 9
SUM_SUB 7, 6, 9
BUTTERFLY_4X 4, 7, 3196, 16069, m8, 9, 10
BUTTERFLY_4X 5, 6, 13623, 9102, m8, 9, 10
SWAP 1, 4
SWAP 3, 6
%endmacro
%macro DIVIDE_ROUND_2X 4 ; dst1, dst2, tmp1, tmp2
psraw m%3, m%1, 15
psraw m%4, m%2, 15
psubw m%1, m%3
psubw m%2, m%4
psraw m%1, 1
psraw m%2, 1
%endmacro
INIT_XMM ssse3
cglobal fdct8x8, 3, 5, 13, input, output, stride
mova m8, [pd_8192]
mova m12, [pw_11585x2]
pxor m11, m11
lea r3, [2 * strideq]
lea r4, [4 * strideq]
mova m0, [inputq]
mova m1, [inputq + r3]
lea inputq, [inputq + r4]
mova m2, [inputq]
mova m3, [inputq + r3]
lea inputq, [inputq + r4]
mova m4, [inputq]
mova m5, [inputq + r3]
lea inputq, [inputq + r4]
mova m6, [inputq]
mova m7, [inputq + r3]
; left shift by 2 to increase forward transformation precision
psllw m0, 2
psllw m1, 2
psllw m2, 2
psllw m3, 2
psllw m4, 2
psllw m5, 2
psllw m6, 2
psllw m7, 2
; column transform
FDCT8_1D 0
TRANSPOSE8X8 0, 1, 2, 3, 4, 5, 6, 7, 9
FDCT8_1D 1
TRANSPOSE8X8 0, 1, 2, 3, 4, 5, 6, 7, 9
DIVIDE_ROUND_2X 0, 1, 9, 10
DIVIDE_ROUND_2X 2, 3, 9, 10
DIVIDE_ROUND_2X 4, 5, 9, 10
DIVIDE_ROUND_2X 6, 7, 9, 10
mova [outputq + 0], m0
mova [outputq + 16], m1
mova [outputq + 32], m2
mova [outputq + 48], m3
mova [outputq + 64], m4
mova [outputq + 80], m5
mova [outputq + 96], m6
mova [outputq + 112], m7
RET
%endif
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